Lactarius mitissimus Fr. + Picea

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Literature

references
  Weiss M (1991) Studies on ectomycorrhizae XXXIII. Description of three mycorrhizae synthesized on Picea abies. Mycotaxon 40: 53-77.

Morphology

Morphology of the mycorrhizal system
length
0 mm    Lower value of unspecified range (could be µ-s.d., but not known)
8 mm    Upper value of unspecified range (could be µ+s.d., but not known)
ramification presence-type
  monopodial-pyramidal
tips {per 10 mm} number
4     Lower value of unspecified range (could be µ-s.d., but not known)
8     Upper value of unspecified range (could be µ+s.d., but not known)
ramification orders
0     Lower value of unspecified range (could be µ-s.d., but not known)
1     Upper value of unspecified range (could be µ+s.d., but not known)
main axis diameter
0.4 mm    Lower value of unspecified range (could be µ-s.d., but not known)
0.6 mm    Upper value of unspecified range (could be µ+s.d., but not known)
rhizomorphs as stout, short, conical structures presence-abundance
  absent
rhizomorphs as short mycorrhiza-like outgrowths with blunt tips presence
  absent
rhizomorphs presence
  present
rhizomorphs frequency
  infrequent
Morphology of the unramified ends
shape
  straight
or    bent
or    tortuous
length
0 mm    Lower value of unspecified range (could be µ-s.d., but not known)
3 mm    Upper value of unspecified range (could be µ+s.d., but not known)
diameter
0.35 mm    Lower value of unspecified range (could be µ-s.d., but not known)
0.5 mm    Upper value of unspecified range (could be µ+s.d., but not known)
colour
  brown
or    orange
very tip colour
  whitish
older parts colour
  brown
mantle secreted latex {after scratching mantle} presence
  present
mantle secreted latex {after scratching mantle} colour-habit
  white, remaining white after some minutes
mantle surface {in general} habit
  smooth
or    not smooth
mantle surface {in detail} kind
  loosely grainy or warty
Morphology of rhizomorphs
diameter
0 mm    Lower value of unspecified range (could be µ-s.d., but not known)
0.3 mm    Upper value of unspecified range (could be µ+s.d., but not known)
colour
  concolourous to mantle
or    brown
or    orange

Anatomy

Anatomical features of the entire mycorrhiza
emanating elements presence-type
  rhizomorphs
or    cystidia
emanating elements cystidia location
  on outer mantle layer
blue granules presence
  absent
Anatomy of laticifers
presence
  absent
or    present
location
  middle mantle layer
or    rhizomorphs
shape
  straight and even
ramification presence-abundance
  infrequent
cell length
15 µm    Lower value of unspecified range (could be µ-s.d., but not known)
100 µm    Upper value of unspecified range (could be µ+s.d., but not known)
cell diameter
5 µm    Lower value of unspecified range (could be µ-s.d., but not known)
10 µm    Upper value of unspecified range (could be µ+s.d., but not known)
Anatomical features of the mantle
Anatomy of the outer mantle layer apart from the ectormycorrhizal tip
organisation
  pseudoparenchymatous
organisation {if pseudoparenchymatous} cell shape
  epidermoid, puzzle-like, jig-saw-shaped
mantle type
  epidermoid cells bearing a hyphal net (type Q)
hyphal net cells shape
  not specialized
and    with roundish lobes
hyphal net cell walls habit
  faint, delicate, inconspicuous, rather thin
septa clamps presence
  absent
cell pigment location-colour
  membranaceously yellowish
and    membranaceously brownish
cell diameter
4 µm    Lower value of unspecified range (could be µ-s.d., but not known)
15 µm    Upper value of unspecified range (could be µ+s.d., but not known)
cell length
4 µm    Lower value of unspecified range (could be µ-s.d., but not known)
15 µm    Upper value of unspecified range (could be µ+s.d., but not known)
cell density
13     Mean (= average)
cell wall thickness
0.2 µm    Lower value of unspecified range (could be µ-s.d., but not known)
2 µm    Upper value of unspecified range (could be µ+s.d., but not known)
cell wall surface habit
  smooth
cell wall projections presence
  present
cell wall projections abundance
  infrequent
cell wall projections shape
  even in thickness
drops of exuded pigment presence
  absent
Anatomy of the middle mantle layer
organisation
  plectenchymatous
hyphae arrangement
  plectenchymatous, without pattern
cell pigment location-colour
  membranaceously yellowish
cell diameter
3 µm    Lower value of unspecified range (could be µ-s.d., but not known)
5 µm    Upper value of unspecified range (could be µ+s.d., but not known)
cell wall thickness
0.2 µm    Mean (= average)
cell wall surface habit
  smooth
Anatomy of the inner mantle layer
organisation
  plectenchymatous
hyphae arrangement
  without pattern
septa clamps presence
  absent
cell diameter
2 µm    Lower value of unspecified range (could be µ-s.d., but not known)
6 µm    Upper value of unspecified range (could be µ+s.d., but not known)
Anatomy of the outer mantle layer of the ectormycorrhizal tip
anatomy mantle outer mantle layer {of ectomycorrhizal tip} cell density
18     Mean (= average)
Anatomy of the mantle in longitudinal section
mantle thickness {apart from tip}
30 µm    Lower value of unspecified range (could be µ-s.d., but not known)
50 µm    Upper value of unspecified range (could be µ+s.d., but not known)
mantle different layers presence
  discernable
outer mantle layer organisation
  plectenchymatous
outer mantle layer hyphae radially diameter
1 µm    Lower value of unspecified range (could be µ-s.d., but not known)
4 µm    Upper value of unspecified range (could be µ+s.d., but not known)
middle mantle layer organisation
  pseudoparenchymatous
middle mantle layer hyphae tangentially length
4 µm    Lower value of unspecified range (could be µ-s.d., but not known)
15 µm    Upper value of unspecified range (could be µ+s.d., but not known)
20 µm    Maximum value
middle mantle layer hyphae radially diameter
3 µm    Lower value of unspecified range (could be µ-s.d., but not known)
9 µm    Upper value of unspecified range (could be µ+s.d., but not known)
inner mantle layer organisation
  plectenchymatous
inner mantle layer hyphae radially diameter
1 µm    Lower value of unspecified range (could be µ-s.d., but not known)
3 µm    Upper value of unspecified range (could be µ+s.d., but not known)

Anatomy of the tannin cells in longitudinal section
presence
  present


Anatomy of the Hartig net in longitudinal section
presence
  present
kind
  protruding towards endodermis
anatomy mantle longitudinal section hyphal cells around tannin cells shape
  roundish
anatomy mantle longitudinal section hyphal cells around tannin cells thickness
2 µm    Lower value of unspecified range (could be µ-s.d., but not known)
7 µm    Upper value of unspecified range (could be µ+s.d., but not known)
anatomy mantle longitudinal section hyphal rows around tannin cells number
  one
or    two
or    three
anatomy mantle longitudinal section hyphal cells around cortical (epidermal) cells shape
  roundish
anatomy mantle longitudinal section hyphal cells around cortical cells (epidermal) thickness
2 µm    Lower value of unspecified range (could be µ-s.d., but not known)
5 µm    Upper value of unspecified range (could be µ+s.d., but not known)
anatomy mantle longitudinal section hyphal rows around cortical (epidermal) cells number
  one
structure {in plan view}
  of palmetti type
lobes width
1.5 µm    Lower value of unspecified range (could be µ-s.d., but not known)
5 µm    Upper value of unspecified range (could be µ+s.d., but not known)
Anatomy of the mantle in cross-section



Anatomy of the emanating elements in general
septal pores configuration
  globular thickenings
backwards-oriented clamps presence
  absent
Anatomy of cystidia

Anatomy of cystidia (type 1)
type
  thin-walled, slightly tapering, often rather similar to ends of normal hyphae, but mostly originating from a pseudoparenchyma (type O)
septa presence
  absent
septa kind
  absent, with basal clamp only
diameter {proximal}
2 µm    Lower value of unspecified range (could be µ-s.d., but not known)
5 µm    Upper value of unspecified range (could be µ+s.d., but not known)
diameter {distal}
2 µm    Lower value of unspecified range (could be µ-s.d., but not known)
5 µm    Upper value of unspecified range (could be µ+s.d., but not known)
length
6 µm    Lower value of unspecified range (could be µ-s.d., but not known)
30 µm    Upper value of unspecified range (could be µ+s.d., but not known)
cell wall colour
  absent
cell wall colour {relative to mantle cells}
  lacking or less intense
cell wall thickness
0.2 µm    Mean (= average)
cell wall evenness
  even in thickness
surface habit
  smooth
contents presence
  absent
contents type
  absent

Anatomy of emanating hyphae
shape
  not striking
cell pigment location-colour
  membranaceously brownish
drops of exuded pigment presence
  absent

Anatomy of the ramification of emanating hyphae
distance {from septum}
  adjacent to septum
side-branches at septum number
  one side-branch at septum

Anatomy of the septa of emanating hyphae
clamps presence
  absent
clamps hole presence
  absent
clamps blister-like structure {at basis} presence
  absent


Anatomy of the cells of emanating hyphae
anatomy emanating elements emanating hyphae cell shape
  even
anatomy emanating elements emanating hyphae cell diameter
2 µm    Lower value of unspecified range (could be µ-s.d., but not known)
3 µm    Upper value of unspecified range (could be µ+s.d., but not known)
anatomy emanating elements emanating hyphae cell wall surface habit
  smooth
or    without lens-shaped appositions
or    without spindle-shaped appositions
anatomy emanating elements emanating hyphae cell wall thickness
0.2 µm    Mean (= average)
anatomy emanating elements emanating hyphae cell wall {apart from tip} evenness
  even in thickness


Anatomy of rhizomorphs
type
  slightly differentiated; central hyphae somewhat enlarged
(type C)
internal nodia presence
  absent
gelatinized hyphae presence
  absent
cup-like structures on surface presence
  absent
a "ball" of intertwined, ramified, thin hyphae presence
  absent

Anatomy of hyphae in rhizomorphs
ampullate, trumpet-like inflated presence
  absent
Anatomy of vessel-like or thickened hyphae in rhizomorphs
anatomy emanating elements rhizomorphs hyphae ampullate, trumpet-like inflated presence
  absent
Anatomy of central non-vessel-like hyphae in rhizomorphs
anatomy emanating elements rhizomorphs hyphae ampullate, trumpet-like inflated presence
  absent
Anatomy of peripheral hyphae in rhizomorphs
anatomy emanating elements rhizomorphs hyphae ampullate, trumpet-like inflated presence
  absent
Anatomy of solitary thick-walled hyphae in rhizomorphs
anatomy emanating elements rhizomorphs hyphae ampullate, trumpet-like inflated presence
  absent
Anatomy of chlamydospores
presence
  absent
Anatomy of haustoria
{of ectomycorrhiza former} presence
  present
{of ectomycorrhiza former} abundance
  occasionally present
shape
  globular
diameter
1 µm    Lower value of unspecified range (could be µ-s.d., but not known)
7 µm    Upper value of unspecified range (could be µ+s.d., but not known)

Chemical reactions

amyloidity haustoria presence
  absent

Ecology

geographic occurrence continent
  Europe

Tree

plant family
  Pinaceae
plant genus
  Picea
plant habitat kind
  forests, woods

Fungus

family
  Russulaceae
subgenus-section
  Lactarius sect. Russulares
fruitbodies growth habit
  epigeous
or    pileate-lamellate

Remarks

public notes
  Surface of very young mycorrhizae with short-spiny very tips, older parts smooth or finely grainy; mycorrhizal ends orange-brown, older parts darker; rhizomorphs orange-brown; outer mantle layers in plan view at tip with almost epidermoid cells, in basal parts cells gradually becoming irregularly shaped to almost isodiametric, cell walls yellowish orange; hyphae of rhizomorphs membranaceously orange; in longitudinal section outer hyphal net appears as a plectenchyma.

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